Thanks, Bill, for your post. The BA330 I got at dealer cost serves me fine most of the time as my gigs are in small places. Since I have the AI Corus, I thought I would use the AI for the bass only and the BA330 for the treble for bigger places. Also, that way I am running them in stereo. I tested by running them in stereo with the left bass only to the AI Corus at the bottom of the pole and the right treble to the BA330 on the pole. Then I ran them in mono as you mentioned. I couldn't really tell much difference between the two setups in terms of the overall sound. Since the two speakers in stereo were set apart vertically, it doesn't really seem to give much stereo effect.

Chris